Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4599344 | Linear Algebra and its Applications | 2015 | 11 Pages |
Abstract
We will show that if âiâ jAiAjâ¥0 for bounded operators Aiâ¥0 (i=1,2,â¯,n), then g(âiAi)â¥âig(Ai) for every operator convex function g(t) on [0,â) with g(0)â¤0; in particular, (âiAi)logâ¡(âiAi)â¥âiAilogâ¡Ai if each Ai is invertible. Let A,Bâ¥0 and A be invertible. Then we will observe that the Fréchet derivative Dg(sA)(B) is increasing on 0
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Mitsuru Uchiyama, Atsushi Uchiyama, Mariko Giga,